I don't know why this was moved here, because those 'open flutes" made by that guy in Brittany are expressly for playing Irish traditional music, not a "world" instrument per se.

Yes he's taking the top of a Quenacho (or Kenakena) which is a big Quena (or Kena) in Low D, as played in Peru and Bolivia, and sticking on the body of an Irish Low D whistle, more or less.

I play Kena, and I have a very nice Kenakena in Low D. When hand cramping forced me to quit playing transverse flute I immediately thought of doing just what that Breton guy did, because it gives you the tone and performance of a transverse flute, but vertically.

I carefully copied the the notch of my Kenakena on a piece of PVC pipe, then cut fingerholes just like those on an Irish Low D whistle. The thing played great, but the 2nd octave was out of tune. I don't know enough about wind instrument design to know why.

Richard, theorizing here but on a transverse flute there is space to the side of the the embouchure hole that is used to control the relationships between the octaves. If you blow from the end, the octave relationship would have to be controlled by embouchure and blowing. unless I'm way off base....

All I know is that with Quenas and Quenachos I can play them and they're in tune, but with my home-made Quenacho/Low Whistle ting the octaves were way off.

I very carefully copied the notch of my Quenacho, and got a very similar tone. I can only guess that the ID of the tubing was too wide or too narrow. Quenas and Quenachos, at least the ones I have, have a conical bore like an Irish flute, big at the top end, narrowing towards the bell end.

That would have to be an awfully long wedge to be effective. A real challenge to construct. The advantage of putting a wedge at the top is that it doesn't need to be nearly as long to make a difference.

Do you still have your attempt at a PVC open whistle? If you're willing to take some detailed measurements from it, I could let you know what might be possible.

It was annoying because I got the cut of the notch just right, got a great tone. ("Just right" being a good duplicate of the notch on my Low D Quenacho.)

BTW the top hole, Hole 1, on Quenas is very large.

I tend to dislike Irish whistles and flutes made like that. There's a "classic" position and size of Hole 1 as seen on 19th century wooden orchestral flutes and the vast majority of whistles, which results in the typical small/medium/small hole sizes for the index/middle/ring fingers of the upper hand.

This usually results in an open C# that's a tad flat (to ET anyhow) and a lovely in-tune crossfingered C natural oxx ooo.

Some makers want to get that open C# fully up to pitch and make Hole 1 huge. That of course spoils crossfingered C natural and can also spoil Hole 1's third role as a vent for Middle D. (Boehm speaks to the multiple duties of that hole which caused him to make it smaller and higher than he considered ideal.)

These last two considerations don't enter into the Quenacho which has a thumb hole for Middle D, and chromatic notes which are half-holed.

From the photos of the Open Whistle is seems that Hole 1 is Quena-like and far too large for playing Irish flute and whistle in the normal way.

Note that the lower-hand hole configuration is similar, giving the same scale and notes on both Quenacho and Low D whistle. However the Quenacho has that huge Hole 1, in fact all three upperhand holes tend to be large as you can see.

Hole 1 looks big in the Open Whistle photos, and his fingering chart gives oxx xxo for C natural, which indicates a Hole 1 larger than is normal in Irish woodwinds.

I look forward to hearing about your findings.

I've written him about this issue, sadly my French is practically nonexistent. I do have, happily, a family member who works as a French translator, and I hope this will help me communicate my desire to have an Irish-style Hole 1.

All I know is that with Quenas and Quenachos I can play them and they're in tune, but with my home-made Quenacho/Low Whistle ting the octaves were way off.

I very carefully copied the notch of my Quenacho, and got a very similar tone. I can only guess that the ID of the tubing was too wide or too narrow. Quenas and Quenachos, at least the ones I have, have a conical bore like an Irish flute, big at the top end, narrowing towards the bell end.

This could explain it. The taper in a flute is designed to help control the octave tuning. That was one of the great advancements of the baroque era flute as I understand it.

The holes are dependent on the key and range and the instrument. Narrow bore forces you up the scale, but then you have to deal with odd sized holes that are hard to half finger. Narrow bore has a weaker octave and you need to let loose, upper octave is loud and you need to be sweet.

I have found that the fife and flute allows me to expand the force and pitch of those limits. Notch flutes are great for expanding range power and flexibility. I mostly like the traverse flutes.

Made an end blown willow flute from PVC. Fun, hard, doesn't make music yet just run the scales.

Enjoyable but different. Just like every instrument.

_________________"Be not deceived by the sweet words of proverbial philosophy. Sugar of lead is a poison."

I measured the ID of a length of Schedule 40 white PVC pipe I have, and it's 19mm which is the standard bore for the Boehm flute AFAIK.

I ordered one of those white plastic curved Nuvo headjoints for $35. My plan is to stick the Nuvo Boehm headjoint on a 19mm ID PVC body with fingerholes placed like a Low D Whistle and see what happens. What I hope happens is a thing that plays sort of like a flute but is played vertically like a whistle.